NAD+-dependent alpha-aminoadipic semialdehyde dehydrogenase, ALDH family members 7A1 and 7B
Alpha-aminoadipic semialdehyde dehydrogenase (AASADH, EC=188.8.131.52), also known as ALDH7A1, Antiquitin-1, ALDH7B, or delta-1-piperideine-6-carboxylate dehydrogenase (P6CDH), is a NAD+-dependent ALDH. Human ALDH7A1 is involved in the pipecolic acid pathway of lysine catabolism, catalyzing the oxidation of alpha-aminoadipic semialdehyde to alpha-aminoadipate. Arabidopsis thaliana ALDH7B4 appears to be an osmotic-stress-inducible ALDH gene encoding a turgor-responsive or stress-inducible ALDH. The Streptomyces clavuligerus P6CDH appears to be involved in cephamycin biosynthesis, catalyzing the second stage of the two-step conversion of lysine to alpha-aminoadipic acid. The ALDH7A1 enzyme and others in this group have been observed as tetramers, yet the bacterial P6CDH enzyme has been reported as a monomer.